0.4.0 Avalonia Update has been released!

[Happypig375]

With the co[DEMONETIZED]us🦠 shutting down schools, I have had more time to work on CSharpMath lol :rocket:

New additions

1. A massive refactor and rename across CSharpMath (left: 0.3.0, right: 0.4.0)
   • 4x test increase!
2. A new Avalonia front end! (Thanks @jp2masa!)
3. CSharpMath.Editor improvements
   • Enhanced slash (#109)
   • A blinking cursor
   • Inner atom editing
   • Large operator with limits editing
4. New math mode symbol commands! https://github.com/verybadcat/CSharpMath/blob/de1458afa2a2129cc928731885deb634205badc9/CSharpMath/Atom/LaTeXSettings.cs#L588-L818
5. \colorboxes!
6. More helpful error messages!
7. MathButton and TextButton!
   • Usage: https://github.com/verybadcat/CSharpMath/blob/824d0df67b52c71ffbea970f165ad60b35ba16d3/CSharpMath.Forms.Example/CSharpMath.Forms.Example/Controls/MathKeyboard.xaml#L159-L161
   • This control is Xamarin.Forms only as Avalonia buttons can have arbitrary content including MathViews
8. Built-in Cyrillic support!
9. Bugs fixed: #37, #59, #77
10. CI for CSharpMath
11. C# 8 nullable reference types enabled in the whole repo
12. Removed dependency on the unmaintained SkiaSharp.Extended (Also fixes #77)

What's next?

Since the exams, although delayed, are still coming up, I will need to temporarily leave once again. However, there are already a bunch of planned items for the next update once I come back. Stay tuned!

Leftovers from 0.2.0 checklist (see https://github.com/verybadcat/CSharpMath/issues/104)

Item	Comments
#4 Merge with wpf-math	After looking into wpf-math, it depends heavily on the WPF infrastructure and is hard to make cross-platform. In contrast, CSharpMath is built with cross-platform in mind upon creation. A most probable resolution would be CSharpMath supporting the non-WPF platforms while wpf-math stays on WPF to facilitate division of labor.
F# instead of C#	Not really feasible as rewriting an entire solution will be extremely time-consuming but for little benefit. A better way to introduce F# would be in an entirely new project - currently planned for 0.6.0
Refactor TextAtoms and MathAtoms to have common atoms	The layout mechanism for MathAtoms and TextAtoms are too different for both atom hierarchies to unify. Not doing it.
Refactor MathAtoms to get rid of MathAtomType and AtomCloner	Done. All atoms now have a Clone() method.
Unit tests (and picture comparisons)	Done. Added as CSharpMath.Rendering.Tests
Tavis CI integration	Done. Added as GitHub Actions
An intuitive README for getting started	Will be done along with a new website. Currently planned for 0.6.0 - stay tuned!
Documentation on both NuGet and GitHub wiki	A website will be so much better. It will be much more maintainable and customizable. Probably won't do this.
Document release procedure	Done. Added as ReleaseProcedure.txt
Promote awareness!!	Postponed to after 0.6.0 when the website is complete
Native platform support for the popular ones	Maybe. Probably won't do every platform as utilizing CI to automatically run unit tests will be difficult.
Implement \middle	Potential 0.5.0 candidate
Optimize loading times of the Android example project	Potential 0.5.0 candidate

Stay safe🦺, 💪stay healthy🧼 and 🥚🐇Happy Easter🐣🐰!

Supersedes #104.

[algebrainx]

Hi thanks for the update I update my Xamarin Forms Solution to 0.4.0. Now I get an arrow for the function InitializeComponent():

'Could not set up parent class, due to: Generic type definition failed to init, due to: VTable setup of type CSharpMath.Forms.BaseView2[TPainter,TContent] failed assembly:/storage/emulated/0/Android/data/com.companyname.mathx/files/.__override__/CSharpMath.Forms.dll type:BaseView2 member:(null) assembly:/storage/emulated/0/Android/data/com.companyname.mathx/files/.__override__/CSharpMath.Forms.dll type:BaseView2 member:(null)' `

[Happypig375]

try deleting bin/obj folders and rebuilding?

[algebrainx]

tried it still not working also cleared nuget cache

[algebrainx]

When I reset to 0.3.0 it works for me I don't know if the issue is from my solution or the update

[Happypig375]

I can investigate if you send me your solution.

[algebrainx]

Sure check it https://we.tl/t-QoEgR1xKQL

[Happypig375]

Figured it out. Somehow CSharpMath.Forms 0.4.0 had a dependency on CSharpMath.SkiaSharp 0.4.0-beta instead of 0.4.0. I have no idea how this happened.

[algebrainx]

Any suggestions to fix this? So the bug isn't from my solution?

[Happypig375]

Pushed a 0.4.0.1.

[Happypig375]

Or you can explicitly specify a dependency on CSharpMath.SkiaSharp 0.4.0.

[Happypig375]

I guess I have to add a test for loading and using the latest NuGet.

[charlesroddie]

@Happypig375 has there been a change to mathPainter.Draw or to the definition of .Measure?

All the mathPainter positioning is out of place now. I will need to work out what the current definition is, and how to fix all usages of Draw, if the new API is stable. I suspect the new one is incorrect though.

[charlesroddie]

It's looking like a change in the definition of Measure. I remember there were problems with the vertical coordinates of the measure in early releases.

We have the following code to adjust y positioning based on whether you want the lining to be at y or the center or the top. Only YTextAlign.Line works now which suggests a bug with measure.

let yCoordinateToDrawTo =
    y +
    match yAlign with
    | YTextAlign.Line -> 0.f // works
    | YTextAlign.Center -> -0.5f * (measure.Top + measure.Bottom) // fails
    | YTextAlign.Top -> - measure.Top // fails

[Happypig375]

The behavior of Measure has now been fixed and documented at https://github.com/verybadcat/CSharpMath/blob/6678311f2f4f711ce6992e20ea31cd095205f651/CSharpMath.Rendering.Tests/TestMeasure.cs#L40-L58

[charlesroddie]

Edit: sorry when you said has been fixed you meant you just fixed it. Testing now!

[charlesroddie]

Fix works. Thanks!

[angelklim]

Have been noticing missing text related to starting TeX with $$...$$ (and [...] has the same behavior). For example, "$$p(x)=ax^2+bx+c, \text{ where } a \neq 0$$ A quadratic is a $2^{nd}$ degree polynomial." would only show "A quadratic is a 2nd degree polynomial." And "$$x$$ $$y$$" will only show "y"

Just $$...$$ by itself or after regular seems to display correctly.

[Happypig375]

Fixed in v0.4.2 Added as test: https://github.com/verybadcat/CSharpMath/blob/a3d657815523684da10d096a8e04a9eeeaefc9b5/CSharpMath.Rendering.Tests/Text/QuadraticPolynomial.png

[Happypig375]

Superseded by #190.